Bilge-pump.



w. A. EDWARDS.

BILGE PUMP.

APPLICATION man FEB. 20, 1913.

Patented May 4 I GUM/A1115 era s nce;

WALTER A. EDWARDS, OF DAYTON, KENTUCKY.

BILGE-PUMP.

messes.

tively deep receptacles or holes.

An object of my invention is to produce an improved pump, which is more elfective in operation and is more easily handled, than-similarpumps now in use and known to me.

These and other objects, which will be made apparent in the further description of my invention, I attain by means of a pump embodying the features herein described, and illustrated. in the drawings accompanying and forming a part of this application.

In the drawings, Figure 1 is a partial front elevation and sectional view of a pump embodying my invention; portions of the discharge pipes and of the operating shaft of the pump are shown broken away for convenienceof illustration. Fig. 2 is a partial side elevation of the pump, in connec tion with a transverse sectional view along the lines 2-2 of Fig. 1, portions of thedischarge pipes and the operating shaft being broken away for convenience of illustration. F ig. 3 is a top plan view of the apparatus with the driving motor removed. Fig. l is a bottom plan view of the apparatus. Fig. 5 is a top plan view of the pump impeller, which forms a detail of my invention. Fig. 6 is a sectional view of the pump along the lines 6-6 of Fig. 1, and Fig. 7 is'a sectional view of the impeller along the lines 77 of Fig. 5.

The pump illustrated as an embodiment of my invention includes a casing 8, which incloses an impeller 9, and is so arranged. that the impeller occupies a substantially horizontal position, when the pump is in an op erative position. The pump casing is provided with an inlet or suction 11, which, as illustrated, consists of an annular series of apertures formed in a bottom plate 12. The plate 12 is removably menntedpn the casing 8 and cooperates with the casing in inclosing the impeller. As illustrated, the plate Specification of Letters Patent.

Patented May a, 1915.

Application filed February 20, 1913. Serial No. 749,591.

12 is circular in form, is somewhat larger indiameter than the impeller 9, and is screwed into a circular opening 12, formed in the casing 8 concentrically with the center of rotation of the impeller 9. With this arrangement, the impeller can be readily re moved through the casing, after the plate 12 is removed from the casing.

The casing 8 is similar in many respects to the casings of ordinary centrifugal pumps, except that it is provided with two discharge ports 13, and, consequently two involute passages 14, which, as shown, are located diametrically opposite each other with relation to the impeller 9. The ports 13 are located in the upper side of the casing, and not tangentially in line with the impeller, as is usual in ordinary pumps. The casing is provided, on its upper face,- with a cored boss 8, through which the driving shaft 15 of the impeller projects.

The impeller, illustrated, is provided with integrally formed, and substantially radially extending, impeller blades or vanes 16, which, as shown, are provided at their outer and upper edges, with a blade tie 17, em ployed for the purpose of strengthening the blades. are not provided with a blade tie, and consequently the delivery of water from them is not mpeded. 7, is transversely tapered, so that it decreases in thickness from the upper to the lower side of the blade. This is for the purpose of creating a reactive force on the blades, which tends to lift the impeller, and therefore reduces the weight of the impeller and the shaft on its step bearings, when the impeller is in operation. This is accomplished by so forming the blade, that the inclined face of each blade is located. on the forward side of the blade, and, consequently the reactive force, occasioned by the pressure of the impelled water oneach blade of the impeller, has a vertical componentywhich tends to lift the compeller.

The shaft 15-is adapted to extend vertically when the pump is in an operative position, and it is supported at intermediate points along its length, by means of braces 18 and step bearings 19, which are mounted upon the braces. The braces 18 are secured to upwardly projecting discharge pipes. 2-1, each of which is screwed into one'of the ports 13, and, consequently communicates with one of the involute passages 14.

The lower outer edges of the blades Each blade, as shown in Fig. I

. As illustrated, each'brace is removably secured to each pipe 21, by means of removable clamp plates 22, and its central or hub portion is bored and is also cored out, for the purpose offproviding a lubricant receptacle 23, through which the shaft produring the operation of the pump, these worms tend to movethe lubricant, within the receptacles, upwardly, along the shaft, and thereby prevent it from running qut of the receptacle and down the shaft. The shaft is adapted to be driven by means of an electric or other suitable motor 27, which is removably mounted on a brace 28, secured to the pipes 21, and located above the series of braces 18,near, the top of the pipes; The brace 28 is provided with a central aperture, which conforms to the outer contour of the casing of the motor 27, and through which the motor is adapted to project, when supported by the bracket. The motor casing is also provided with a peripherally extend mg ridge or flange 29, which is adapted to seat upon thebrace 18 and to thereby support the motor. One element 31 of a simple form of tooth clutch or coupling is rigidly secured to the lower end of the motor shaft, and the other element 32, of the coupling, is rigidly secured to the upper end of the shaft 15. The coupling is employed for the purpose of operatively coiinecting the motor to the shaft 15. The element'31is provided with two downwardlyextending teeth 31, which are spaced apart, as shown in Fig; 2, and the member 32 is provided with two upwardly projecting teeth 32, which are spaced apartjas shown in Fig. 1, and which coiiperate with'teeth 31, in forming a positive,. although a somewhat flexible, connection between the motor shaft and the shaft 15. lVith such a coupling, all that is necessary to be done to directly connect the motor 27 to the shaft 15, is to set the motor in place on the brace 28, and to turn its shaft so that the teeth 31 will project downwardly between the teeth 32. This directly connects the motor to the shaft, and at the same time provides sufficient play between the separate parts of the coupling to compensate for any misalinement of the motor shaft and'the shaft 15, which may be present. As illustrated, the upper ends of the pipes 21 are curved to one side, and they both terminate in a downwardly inclined spout 34, which may be of any suitable construememes tion, and which is employed for discharging the Water delivered by the pump. While the spout is shown integrally formed with the pipes 21, it will be understood that it may be secured to the pipes in any-suitable way The operation of assembling the parts to form the pump illustrated, is comparatively simple and .is somewhat as follows: The

.cated in their proper positions on the braces 18 and the cooperating collars 24 are seiured in the proper positions on the shaft. ,As illustrated, the member 32 of the shaft coupling cotiperates with one of the step bearings in supporting the shaft, and it is secured to the shaft 15, after its cooperating bearing is located in the proper position. After the impeller 9 is in place in the casing, the bottom plate 12 is then screwed into the opening 12, and the motor 27 is set on to the brace 28, so that the teeth 31 engage the teeth 32 of the shaft coupling. This com-- pletes the assembling of the pump.

It will be understood, from this description, that the motor 27 can be quickly and easily removed from, and located in place on its supporting bracket 28. During the as sembling of the pump, the apertures23 of the braces 18, and the cored out portion of the boss 8', are" preferably filled or packed with some lubricating material, before the shaft 15 is inserted through them. As has been describeththe' worms or screw threads 26, on the shaft 15, prevent this lubricant from running down the shaft, while the pump is'in operation. i

During the operation of the apparatus, the impeller draws the water-into the casing, throughthe suction 11 of the pump, and discharges it in the usual manner through both of the pipes 21. The reactive force of the water on the impeller, as previously described, tends to lift the propeller, and, con sequently the propeller, in elfect, floats within; the'casing, and little weight is im posed upon the step bearings 19. With such an arrangement, frictional. resistance of the pump is very low, and it can, therefore, be rotated at high speeds, without danger. of overheating or injuryin f the bearings. With the inlet or suction l1 located in the bottom plate of the pump, the pump is capable of removing almost all of the water from its supporting surface, and '1 have pipes 21 are screwed into the discharge ports the apparatus described, without departing,

from the spirit and scope of my invention, as set forth in the appended claim.

What I claim is:

A bilge pump comprising a horizontal casing having discharge openings in its top and a central admission port in its bottom,

a horizontally disposed impeller located within the casing and having substantiall radially extending blades provided Wit downwardly and rearwardly inclined forward faces, a vertical shaftconnected to the 20 -impeller and extending through the top of the casing, and discharge pipes secured to the casing at the discharge openings.

In. testimony whereof, I have hereunto subscribed my name this eighteenth day of 25 February, 1913.

WALTER A. EDWARDS. Witnesses:

E. W. MGCALLIsTER, W. TnonN'roN Bounn'r. 

